381917domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form A037074(k) - 6, where A037074(k) is a twin prime product.at n=12A162834Number of excursions of length n with Motzkin-steps avoiding the consecutive steps UD, HU, HH and DH.at n=33A329691Primes in A240860 (up to sign).at n=20A339957Prime numbersat n=32442